Dusting-door and dusting-door brick.



R. J. ALLEN.

DUSTING DOOR AND DUSTING DOOR BRiCK.

APPLICATION FILED sznzs. 1915.

1,284,546. Patented NOV. 12,1918.

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INVENTOR WITNESSES; 75M M B A orne s, 11 //M%/ ROBERT J'. ALLEN, OF NEW YORK, N. Y.

DUSTING-DOOR AND DUSTING-DOOR BRICK.

Specification of Letters Patent.

Patented Nov. 12, 1918.

Application filed September 25, 1915; Serial No. 52,734.

To all whom it may concern:

Be it known that I, ROBERT J. ALLEN, a subject of the King of Great Britain, residing in the borough of Manhattan, city, county, and State of New York, have invented certain new and useful Improvements in Dusting-Doors and Dusting-Door Bricks, of which the following is a specification.

This invention relates to and has for an object to provide an improved brick insulated boiler dusting door wherein the duster openings are provided in integral blocks.

In the drawings accompanying this spec ification one practicable embodiment of my invention is illustrated. In such drawings,

Figure l is an elevation of the side wall of a boiler equipped with my improvement;

Fig. 2 is an enlarged cross vertical section through the boiler at about the plane indicated by the line 22 of Fig. 1;

Fig. 3 is a horizontal section at about the plane indicated by the line 3-3 of Fig. l; and

Fig. 4 is a perspective view of one of the brick lining units.

As is well known to those having to do with tube boilers, it is necessary from time to time to remove the accumulation of dust from the tubes, particularly in boilers having horizontally or obliquely disposed tubes. This is preferably done by inserting the nozzle of a hose through suitable openings provided in what are termed dusting doors. These doors, being subjected to the influence of great internal heat and combustion and gases, have to be lined with suitable resisting lining, preferably furnace brick. According to existing methods, such linings have been made of ordinary commercial-sized brick, chipped by hand to conform to the necessary opening, which is preferably flared so that the nozzle of the hose may be turned in various directions. The disadvantage found in this method of hand chipping is that it consumes a large amount of time; that this work frequently has to be done in a considerable hurry requiring rapidity of action by the workmen; sufficient neatness and often accuracy are of secondary consideration to the workmen. These linings being built up of a plurality of brick having openings between them and irregular joining surfaces due to the chipping, deteriorate very rapidly in use and require renewing. Many boilers installed at the present time are of such dimensions that nine duster openings are provided at each of three points along the lengthof the stack of boiler tubes. Thisis in conformity to the practice wherein the heat from the furnace passes three times through the tubes, the series of dusting door openings being located at the respective portions of heat passage.

The conventional method of building these doors is to provide three iron doors, each having three duster openings, the doors being faced upon the inside with the brick formed by hand in the manner above mentioned. If the brick lining becomes seriously impaired either from initial faults or from the disintegrating action of the flames and gases passing them, it is necessary to rip away considerable of the wall and remove the door. This can be done only when the furnace supplying the heat is not in action. These repairs are generally done after hours or if much time should be required, on Sundays or holidays, making it necessary to pay double wages to the workman employed in tearing out and rebuilding the walls, and

in reforming and refitting the various brick for making up the lining. In ordinary construction the brick going to make up the linings for the dusting doors are laid continuously with the lining 5 generally, and are laid up in the usual courses. In using my improved brick or block these are also set into the lining wall 5 and constitute a continuous part of the wall structure.

In the drawings 5 represents the inner side of the outer brick wall of the boiler,

some of the obliquely disposed tubes of which are represented at 6. Three iron dusting doors are represented at 7, 7 and 7, each of which is provided with three oval openings, represented at 8. The outer side of the wall 5 is of suitable masonry which is represented at 50, in which wall there is provided a suitable flaring opening 51 leading to the duster openings so as to permit of the proper manipulation of the hose for directing its nozzle up and down the boiler tubes 6. According to my present invention each cluster opening in the dusting door lining 9 is formed with continuous and integral walls, the opening being represented at 10. Preferably a single brick (see Fig. 4), is provided for completely lining each dusting door; such brick being of suitable thickness and provided with a plurality of openings designed to register with the openings 8 in the iron dusting doors, and being flared inwardly for accommodating the hose in the manner above mentioned. The iron door when lined by my improved brick is completely covered and shielded from the flames and hot gases The brick illustrated consists of a unitary lining for each dusting door embodying a plurality of openings having integral or continuous walls. Each portion of the lining embodying a single duster opening lining takes the place of a large number of handchipped brick, and each unit comprising a plurality of these openings will be seen to dispense with a still larger number or such brick. The superficial area of each of my improved dusting door brick is equal to the superficial area of a plurality of ordinary brick, and in the form of the invention illustrated it will be seen that both the width and height of each such brick is equal to a plurality of ordinary brick. hen the work is being installed the necessary number of these brick lining blocks are provided. According to one popular form of installation, eighteen of these blocks are provided for each boiler. It will be seen that the linings being made to scale and to conform to the size and dimensions of the iron dusting doors, are rapidly and accurately secured in place preferably by means of bolts 12 passing through the iron plates and the brick linings.

Not only does this improved door construction reduce the expense of labor in co.n struction, but it also reduces the time required for this portion of the work,,\vhicl1 in modern building operations is a very important factor, and it also assures accurate vorlnnanship, so that the boiler setter knows b inspection that the work is accurately done, and the inspector for the owners also is able to readily ascertain whether or not the work has been done in a workmanlike and satisfactory manner. Of course nothing coming in contact with the burning gases passing through a boiler is indestructible, and it is beyond the realm of commercial possibility that each block shall be perfeet. to replace one lining by another. This can readily be done in a short time, and without tearing down the entire wall, as heretofore.

Consequently at times it is necessary.

Should, for instance, it be desired to remove the lining of the door 7 of Fig. l, the few courses of brick below the door 7 and below the ends of the door 7 where these extend beyond the outline of the door 7 will be removed and the doors 7 and 7" permitted to drop out. The necessary change will be made and the doors replaced and the wall bricked up, this taking but an hour or twos work of a bricklayer, whereas by the old method the necessary repairs required the re-ohipping of a large number of brick making up the lining.

It is to be understood that the foregoing is an illustrative example of my invention, and that changes may be made within the scope of the claims without departing from the spirit of the invention.

ll hat I claim is 1. A tubeboiler dusting door brick equal in its height and in its Width to a plurality of ordinary brick, and comprising a brick block having a plurality of flaring openings, the walls of each such opening being continuous and integral.

In a boiler setting, the combination with a lining of masonry, an iron dusting door having a plurality of duster openings and a lining for said door comprising a brick block equal in its height and in its width to a plurality of ordinary brick, and having openings mating with the openings in the said door and setting into and forming a part of the masonry lining, the material of the block completely lining and protecting the said door.

3. In a boiler setting, the combination with a lining of masonry, a plurality of superposed iron dusting doors disposed one above the other and each having a plurality of duster openings disposed one above the other, and a brick lining block for each said iron door provided with openings mating with the openings therein and set into and forming a part of the masonry lining, the material or the blocks completely lining and protecting the said iron doors.

In witness whereof, I have hereunto signed my name in the presence of two subscribing witnesses.

ROBERT J. ALLEN.

Witnesses HENRY M. TURK, FRED WHITE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, If. e. 

